Yanin's place is awesome, on my first day of visit, they gave us a quick local tour around the area to familiarize ourselves, she pointed local markets, malls, of which there are many eating centers nearby.
The place itself is very clean, with a great wi-fi connection (I did not expect this in the first place). They also provided us with snacks, instant noodles, drinks, antiseptic gel (my staying period was disease outbreak period), even laundry detergents and softeners.
For your information, they have paid washing machine just outside the staying place where you only pay 30 baht in coins (10 baht coin x 3) and another 20 baht for dryer. Very convenient if you are staying for a long period like me!
Lastly, they are very quick responsive and helpful!
I would gladly book from them again the next time I visit the bangsue area of Bangkok!